137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2016 Intel Corporation.
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* Copyright(c) 2017 IBM Corporation.
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* All rights reserved.
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*/
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#ifndef __L3FWD_LPM_ALTIVEC_H__
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#define __L3FWD_LPM_ALTIVEC_H__
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#include "l3fwd_altivec.h"
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/*
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* Read packet_type and destination IPV4 addresses from 4 mbufs.
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*/
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static inline void
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processx4_step1(struct rte_mbuf *pkt[FWDSTEP],
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vector unsigned int *dip,
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uint32_t *ipv4_flag)
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{
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struct ipv4_hdr *ipv4_hdr;
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struct ether_hdr *eth_hdr;
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uint32_t x0, x1, x2, x3;
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eth_hdr = rte_pktmbuf_mtod(pkt[0], struct ether_hdr *);
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ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
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x0 = ipv4_hdr->dst_addr;
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ipv4_flag[0] = pkt[0]->packet_type & RTE_PTYPE_L3_IPV4;
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rte_compiler_barrier();
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eth_hdr = rte_pktmbuf_mtod(pkt[1], struct ether_hdr *);
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ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
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x1 = ipv4_hdr->dst_addr;
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ipv4_flag[0] &= pkt[1]->packet_type;
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rte_compiler_barrier();
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eth_hdr = rte_pktmbuf_mtod(pkt[2], struct ether_hdr *);
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ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
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x2 = ipv4_hdr->dst_addr;
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ipv4_flag[0] &= pkt[2]->packet_type;
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rte_compiler_barrier();
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eth_hdr = rte_pktmbuf_mtod(pkt[3], struct ether_hdr *);
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ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
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x3 = ipv4_hdr->dst_addr;
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ipv4_flag[0] &= pkt[3]->packet_type;
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rte_compiler_barrier();
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dip[0] = (vector unsigned int){x0, x1, x2, x3};
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}
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/*
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* Lookup into LPM for destination port.
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* If lookup fails, use incoming port (portid) as destination port.
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*/
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static inline void
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processx4_step2(const struct lcore_conf *qconf,
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vector unsigned int dip,
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uint32_t ipv4_flag,
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uint8_t portid,
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struct rte_mbuf *pkt[FWDSTEP],
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uint16_t dprt[FWDSTEP])
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{
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rte_xmm_t dst;
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const vector unsigned char bswap_mask = (vector unsigned char){
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3, 2, 1, 0,
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7, 6, 5, 4,
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11, 10, 9, 8,
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15, 14, 13, 12};
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/* Byte swap 4 IPV4 addresses. */
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dip = (vector unsigned int)vec_perm(*(vector unsigned char *)&dip,
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(vector unsigned char){}, bswap_mask);
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/* if all 4 packets are IPV4. */
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if (likely(ipv4_flag)) {
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rte_lpm_lookupx4(qconf->ipv4_lookup_struct, (xmm_t)dip,
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(uint32_t *)&dst, portid);
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/* get rid of unused upper 16 bit for each dport. */
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dst.x = (xmm_t)vec_packs(dst.x, dst.x);
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*(uint64_t *)dprt = dst.u64[0];
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} else {
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dst.x = (xmm_t)dip;
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dprt[0] = lpm_get_dst_port_with_ipv4(qconf, pkt[0],
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dst.u32[0], portid);
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dprt[1] = lpm_get_dst_port_with_ipv4(qconf, pkt[1],
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dst.u32[1], portid);
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dprt[2] = lpm_get_dst_port_with_ipv4(qconf, pkt[2],
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dst.u32[2], portid);
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dprt[3] = lpm_get_dst_port_with_ipv4(qconf, pkt[3],
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dst.u32[3], portid);
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}
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}
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/*
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* Buffer optimized handling of packets, invoked
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* from main_loop.
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*/
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static inline void
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l3fwd_lpm_send_packets(int nb_rx, struct rte_mbuf **pkts_burst,
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uint8_t portid, struct lcore_conf *qconf)
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{
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int32_t j;
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uint16_t dst_port[MAX_PKT_BURST];
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vector unsigned int dip[MAX_PKT_BURST / FWDSTEP];
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uint32_t ipv4_flag[MAX_PKT_BURST / FWDSTEP];
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const int32_t k = RTE_ALIGN_FLOOR(nb_rx, FWDSTEP);
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for (j = 0; j != k; j += FWDSTEP)
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processx4_step1(&pkts_burst[j], &dip[j / FWDSTEP],
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&ipv4_flag[j / FWDSTEP]);
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for (j = 0; j != k; j += FWDSTEP)
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processx4_step2(qconf, dip[j / FWDSTEP],
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ipv4_flag[j / FWDSTEP],
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portid, &pkts_burst[j], &dst_port[j]);
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/* Classify last up to 3 packets one by one */
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switch (nb_rx % FWDSTEP) {
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case 3:
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dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j], portid);
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j++;
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/* fall-through */
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case 2:
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dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j], portid);
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j++;
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/* fall-through */
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case 1:
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dst_port[j] = lpm_get_dst_port(qconf, pkts_burst[j], portid);
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j++;
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/* fall-through */
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}
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send_packets_multi(qconf, pkts_burst, dst_port, nb_rx);
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}
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#endif /* __L3FWD_LPM_ALTIVEC_H__ */
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